Own the end-to-end routing model: features, objective, training, calibration, evaluation, and rollout (shadow, A/B, full). Work with production fleet data, benchmark harnesses, and platform engineers to instrument per-request signals (including decode speed) and ensure production-parity with rigorous evals and error bars. Tech stack highlights: Python, PyTorch, SQL at scale (ClickHouse), OpenAI/Anthropic-compatible LLM APIs, and GitLab CI.

Work on DuckDuckGo's C++ Functional Team building high-performance browser core code (Chromium) using modern C++ (C++23). Lead projects end-to-end, implement tracker blocking and VPN/PII features, profile and optimize performance, and use metrics to validate results. Requires 7+ years of software engineering experience and strong foundations in algorithms, data structures, concurrency, memory management, debugging, and large build systems. Role is remote across many countries and expects travel ~2x/year for team meetups.

Remote senior role on DuckDuckGo's Web Dependability Engineering team focused on ensuring websites work across DuckDuckGo browsers on multiple platforms. Requires 7+ years building and debugging complex web apps with vanilla JavaScript, deep knowledge of web standards, web components, and browser APIs, plus experience reverse-engineering obfuscated code, triaging incidents, and shipping cross-platform fixes. Role involves occasional travel (about twice a year) and passing a background check. Compensation is paid on regional annual scales (region-specific amounts listed in the posting).

100% remote (Europe) contract role delivering hands-on platform and security engineering for Form3's cloud-native payments systems. Responsibilities include designing and building distributed, production-ready capabilities across API security, cryptographic controls, AI governance, software supply chain security and automated security tooling using Go and cloud/container technologies (AWS/GCP/Azure, Kubernetes). Contractors must be based in one of the listed European countries and will start their first day in a local office to collect equipment.

You will author merged PRs and build integrations (libraries, agent frameworks, MCP servers, automation platform connectors) so developers and AI agents can access SearchApi. Required: proven merged open-source contributions in repos you don't own, fluency with Ruby/Python/TypeScript and at least one agent/automation framework, and strong written English for docs and PRs.

SearchApi seeks an experienced engineer to own the browser stack: patch browser engines (Chromium/Firefox) in C++, maintain per-OS fingerprint profiles, eliminate automation-detection signals (navigator, WebGL, canvas, audio, fonts, Client Hints, CDP leaks), and build tooling and tests to prevent regressions. The role requires deep reverse-engineering skills, familiarity with large browser build systems, and proven contributions to browser-engine patches or stealth tooling.

Join DuckDuckGo's Privacy Functional Team to lead development and maintenance of privacy technologies (e.g., tracker radar, web tracking, email protections) and participate in privacy review and audit processes. The role involves system design for search/AI features, mentoring other engineers, and requires travel twice yearly for company gatherings. Compensation listed as $178,500 USD annually plus stock options.

Join DuckDuckGo as a Senior Backend Engineer on a remote-first Backend Functional Team. You'll build and maintain backend systems (Perl, Go, Node.js), implement AI-assisted features and data pipelines with a privacy-first approach, mentor other engineers, and collaborate cross-functionally. The role expects 7+ years of backend experience, excellent communication and project management skills, and travel to two company events per year.

Ashby is hiring a Staff Platform Engineer to own end-to-end platform projects: scaling infrastructure, improving developer experience, implementing SLOs/SLIs, enabling canary/gradual rollouts and feature flags, hardening security/privacy, and supporting event-driven and data warehouse initiatives. Tech stack mentioned: TypeScript, Node.js, React, GraphQL, Postgres, Redis, AWS, Datadog, Sentry, CI/CD. Role is remote across multiple European countries and includes on-call responsibilities and occasional in-person meetups.

Senior, hands-on Staff Product Engineer (Ruby on Rails). Remote role owning hard PRs and end-to-end product areas (billing, enterprise auth, API, dashboard, infra), responsible for performance, security, mentoring via code review, and shipping production Rails code. Fluent English and prior Stripe/billing experience required.

SearchApi seeks a remote Ruby Engineer to build and maintain web-scraping integrations and browser automation (CDP), tackle anti-bot evasion, optimize concurrency, and support production systems at scale. The role involves debugging production issues, reverse engineering protections, contributing across the stack (Ruby on Rails, PostgreSQL, Redis, Sidekiq), customer-facing support, and improving monitoring and infrastructure (Terraform, AWS, Prometheus, Grafana).

Remote role to design and implement greenfield proxy infrastructure: high-performance reverse proxies, IP rotation and session management, IP reputation tracking, geo-targeting and monitoring. Requires deep TCP/UDP and protocol knowledge (HTTP/HTTPS/SOCKS5, HTTP/2/3), Linux networking experience, prior experience building proxy or networking infrastructure, fluent English and a BSc or equivalent technical degree.

SearchApi seeks a remote Anti-Bot Engineer to research and implement anti-bot evasion, reverse engineer detection systems (Cloudflare, Akamai, DataDome, PerimeterX, etc.), optimize Playwright/Puppeteer/CDP configurations, debug TLS/protocol fingerprinting (JA3/JA4, HTTP/2, HTTP/3/QUIC), analyze network traffic, and run headless browsers reliably at scale. Fluent English and deep hands-on experience with browser internals, fingerprinting, network analysis tools, and relevant tooling (Playwright, Puppeteer, Selenium, Wireshark, Burp Suite, mitmproxy) are required.

Remote Senior Technical Support Engineer role supporting enterprise customers of a cybersecurity SaaS. Responsibilities include troubleshooting complex frontend/backend issues, working with engineering/product/security teams, debugging and building small automation tools, and mentoring other support engineers. Requires 5+ years in software engineering or technical support, proficiency in Python, JavaScript, HTML, CSS, and experience with distributed systems and web security.